function initRootFooter() {
    let rootFooter = document.querySelector("#root-footer")
    rootFooter.innerHTML =
        `
    <footer>
        <div class="foot">
            <div class="foot-item">产品1</div>
            <div class="foot-item">板块2</div>
            <div class="foot-item">板块3</div>
            <div class="foot-item">板块4</div>
            <div class="foot-item">板块5</div>
        </div>
    </footer>
`
}